Improvement in slottdig-attger



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Letters Patent No. 81,607, dated September 1, 1868.

IMPROVEMENT IN SLOTTINGjAUGER.

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Bie it known that I, PETER CUNNINGHnM, of Eckley, in the county of Lucerne, and State of Pennsylvania, have invented'a new and improved Mortisng and Slotting-Auger; and I do herebywdeclare that the following is a full, clear, and vexact description thereof, which will enable those skilled in the art to make and use the` some` reference being had to the accompanying drawings, forming part of this specification, in which- The drawing represents a perspective viewvof my invention.'

l lhe object of this invention is to provide an auger with which theoperations of mortising and Blotting muy be performcdrapidly. l i l My invention .consists in forming the twist or helical part of the auger with a number of vertical rows of gouge or chisel-shaped lips, rising from the edge of the twist, and presenting sharp edges in the direction whichfthe auger bores, so that said lips will cut the wood laterally, if the same isl pushed against it after the :Luger has bored down vertically to n. sul'icient depth for the mortise or slot.

In the drawing, a a a a. c., are the lips, which may be made with a rounding or gouge-shaped edge, or a straight chisel-edge, as desired. i

The wood is pushed laterellyagninst the anger, while the same is revolving rapidlyi-na mortising or slotting machine, and a slot or mortise is cut thereby with ease and rapidity.

'l'he lower lips join with the horizontal cutting-edges b, ns shown.

If a square mortise is required, the corners must bechiselled out afterward.

This anger will cut the wood both across and' against the grain, and a mortise or slot may be cut greater than the diameter of the auger.

I claim as new, andniesire'to secure by Letters Patent- A mortising or slotting-nuger, having rows of 'gouge or chisel-lips formed on the edge of the twist, substantially as described, for the purpose set forth.

The above specification of my invention signed by lne, this 3d day of July,`1S6S.

Y PETER CUNNINGHAM.

Witnesses:

WILLIAM GALLAanEn, Jouir Roxen. 

